After turning in Blindsided follow Claptrap through the gateway to the Southern Shelf. On the other side follow Claptrap down the ledge (remember, no fall damage, so just jump straight down!) and protect him from a batch of Brat Bullymongs. Once they've all been dispatched you'll be allowed into the town of Liar's Berg.

Here you'll have to take out a batch of bandits controlled by the ruthless Captain Flynt and eventually another wave of bullymongs. Like the other battles up until this point you should be able to take care of everyone without too much difficulty. Just aim for the head and you'll be done in no time. After they're all gone, Hammerlock will invite you to his shack. Be sure to let Claptrap go first - the fence is still electrified! While Claptrap is... recovering... the one and only Sir Hammerlock will make his debut.

Hand Hammerlock Claptrap's eye, wait from him to finish the repair, and then sit tight while he turns power back on to the small town. Once the power has been restored you will be able to turn the mission into Hammerlock and collect your reward.